The RMT union's complaints relate to the transfer of Piccadilly Line control-room services to a new centre in Hammersmith.
Transport for London plans to replace a number of separate control centres with a single one from 2017.
The Rail, Maritime and Transport Union says the move will cause job losses - and that there are also issues with rates of pay and the lack of "any meaningful offer for Service Control staff for the Olympic period."
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Sir Bernard Hogan-Howe described the standard of an annual fitness test that officers must complete as too low.
Dry and cloudy tonight, winds easing. Lows of 9C.
England rugby star Danny Cipriani has been arrested on suspicion of drink driving following a car crash.